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Selection and matching of welding wire

Selection and matching of welding wire

Selection of flux and welding wire for submerged arc welding of low alloy steel

(1) Selection of flux and welding wire for high strength low alloy steel

Submerged arc welding of low alloy steel is mainly used for hot rolling normalizing steel. When selecting flux and welding wire, the mechanical properties of the weld metal shall be ensured, the welding materials with the same strength as the base metal shall be select , and the impact toughness, plasticity and crack resistance of the weld metal shall be comprehensively considered. The strength of the weld metal should not be too high, usually controlled at not less than or slightly higher than the strength of the base metal, too high will lead to the reduction of the impact toughness, plasticity and crack resistance of the weld metal.

For Quenched and tempered steel, in order to avoid the decrease of toughness and plasticity in the heat affected zone, the coarse wire, high current and multi wire submerged arc welding are generally not used, and the mixed flux of ceramic flux 572f-6 + HJ350 (among which HJ350 accounts for 80% ~ 82%) can be used to realize the submerged arc welding of 30CrMnSiNi2A with h18crmoa welding wire. See Table 2 for commonly used flux and welding wire for submerged arc welding of hot rolled and normalized low alloy steel.
 
钢    号 屈服强度
/MPa
焊    剂 配 用 焊 丝 备    注
09Mn2,
09Mn2Si,09Mn
294 HJ430,HJ431,SJ301 H08A,H08MnA
16Mn,
16Mn,
16MnCu,
14MnNb
343 SJ501,SJ502 H08Mn,H08MnA 用于薄板
HJ430,HJ431,SJ301 H08A 用于不开坡口对接
HJ430,HJ431,SJ301 H08MnA,H10Mn2 用于中板开坡口对接
HJ350 H10Mn2,H08MnMoA 用于厚板深坡口
15MnV,
15MnVCu
16MnNb
15MnVR
392 HJ430,HJ431 H08MnA 用于不开坡口对接
HJ430,HJ431 H10Mn2,H10MnSi 用于中板开坡口对接
HJ250,HJ350,SJ101 H08MnMoA 用于厚板深坡口
15MnV,
15MnVNCu,
15MnVTiRE,
15NbVNR
414 HJ431 H10Mn2
HJ350,HJ250,
HJ252,SJ101
H08MnMoA,
H08Mn2MoA
18MnMoNb,
14MnMoV,
14MnMoVCu,
14MnMoVg,
18MnMoNbg,
18MnMoNbR
490 SJ102 H08MnMoA
HJ250,HJ252,
HJ350,SJ101
H08Mn2MoA,
H08Mn2MoVA,
H08Mn2NiMo
X60
低合金管线钢
414 HJ431 H08Mn2MoA
SJ101 H08MnMoA
SJ102 H10Mn2
X65
低合金管线钢
450 SJ102,SJ301 H08MnMoA